cobra venom article

[RICK LAKE]

wrench 87 I am running 349521 cam in my 484 motor with a Barry R. kit of flat top pistons. My heads are gasket ported and the bowl area is been cleaned up. I don't have an CFM on the Shelby heads but around 300 should be close. I am running a beehive spring which lightens the wieght per valve by 44 grams. The motor is new and have not been to the dyno yet. The Idle for a 484 is nice with a little lope. Very strong and flat torque band, motor still pulling hard at 5,800 rpm hitting the rev limiter in my MSD box. Should make about 450 HP and about 560 ft of torque. With lighter weight springs you can rev to a higher rpm without float or lifter pump up. You can degree the cam for less torque and more hp. I am running -6 degrees. Motor is strong down bottom. I will have to wait until next year to get to the dyno for the real numbers and raise the rpm limiter to 6,500.00 The Float on the valve train should be 6,700 rpm with my changes. I also have an Aluminium flywheel at 22 lbs and not the 40 lbs steel one. I have a KCR cam with .622" number that will go into my 498 motor. Should hit about 500 hp and 600 ft of torque. 484 is very streetable to drive. Rick L. You can make a motor pull to over 7,000 rpm with the correct valve springs and light valve train. A rev kit would help upper RPM control but nobody is maken one at this time. The links between the lifters is some of the problems. Its all about controlling valve float and the bouncing of the valve off the seat on closure.